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libvirt/tools/virsh-nodedev.c

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/*
* virsh-nodedev.c: Commands in node device group
*
* Copyright (C) 2005, 2007-2013 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
* Daniel Veillard <veillard@redhat.com>
* Karel Zak <kzak@redhat.com>
* Daniel P. Berrange <berrange@redhat.com>
*
*/
#include <config.h>
#include "virsh-nodedev.h"
#include <libxml/parser.h>
#include <libxml/tree.h>
#include <libxml/xpath.h>
#include <libxml/xmlsave.h>
#include "internal.h"
#include "virbuffer.h"
#include "viralloc.h"
#include "virfile.h"
#include "virxml.h"
#include "conf/node_device_conf.h"
/*
* "nodedev-create" command
*/
static const vshCmdInfo info_node_device_create[] = {
{.name = "help",
.data = N_("create a device defined "
"by an XML file on the node")
},
{.name = "desc",
.data = N_("Create a device on the node. Note that this "
"command creates devices on the physical host "
"that can then be assigned to a virtual machine.")
},
{.name = NULL}
};
static const vshCmdOptDef opts_node_device_create[] = {
{.name = "file",
.type = VSH_OT_DATA,
.flags = VSH_OFLAG_REQ,
.help = N_("file containing an XML description of the device")
},
{.name = NULL}
};
static bool
cmdNodeDeviceCreate(vshControl *ctl, const vshCmd *cmd)
{
virNodeDevicePtr dev = NULL;
const char *from = NULL;
bool ret = true;
char *buffer;
if (vshCommandOptStringReq(ctl, cmd, "file", &from) < 0)
return false;
if (virFileReadAll(from, VSH_MAX_XML_FILE, &buffer) < 0)
return false;
dev = virNodeDeviceCreateXML(ctl->conn, buffer, 0);
VIR_FREE(buffer);
if (dev != NULL) {
vshPrint(ctl, _("Node device %s created from %s\n"),
virNodeDeviceGetName(dev), from);
virNodeDeviceFree(dev);
} else {
vshError(ctl, _("Failed to create node device from %s"), from);
ret = false;
}
return ret;
}
/*
* "nodedev-destroy" command
*/
static const vshCmdInfo info_node_device_destroy[] = {
{.name = "help",
.data = N_("destroy (stop) a device on the node")
},
{.name = "desc",
.data = N_("Destroy a device on the node. Note that this "
"command destroys devices on the physical host")
},
{.name = NULL}
};
static const vshCmdOptDef opts_node_device_destroy[] = {
{.name = "name",
.type = VSH_OT_ALIAS,
.help = "device"
},
{.name = "device",
.type = VSH_OT_DATA,
.flags = VSH_OFLAG_REQ,
.help = N_("device name or wwn pair in 'wwnn,wwpn' format")
},
{.name = NULL}
};
static bool
cmdNodeDeviceDestroy(vshControl *ctl, const vshCmd *cmd)
{
virNodeDevicePtr dev = NULL;
bool ret = false;
const char *device_value = NULL;
char **arr = NULL;
int narr;
if (vshCommandOptStringReq(ctl, cmd, "device", &device_value) < 0)
return false;
if (strchr(device_value, ',')) {
narr = vshStringToArray(device_value, &arr);
if (narr != 2) {
vshError(ctl, _("Malformed device value '%s'"), device_value);
goto cleanup;
}
if (!virValidateWWN(arr[0]) || !virValidateWWN(arr[1]))
goto cleanup;
dev = virNodeDeviceLookupSCSIHostByWWN(ctl->conn, arr[0], arr[1], 0);
} else {
dev = virNodeDeviceLookupByName(ctl->conn, device_value);
}
if (!dev) {
vshError(ctl, "%s '%s'", _("Could not find matching device"), device_value);
goto cleanup;
}
if (virNodeDeviceDestroy(dev) == 0) {
vshPrint(ctl, _("Destroyed node device '%s'\n"), device_value);
} else {
vshError(ctl, _("Failed to destroy node device '%s'"), device_value);
goto cleanup;
}
ret = true;
cleanup:
virStringFreeList(arr);
if (dev)
virNodeDeviceFree(dev);
return ret;
}
struct vshNodeList {
char **names;
char **parents;
};
static const char *
vshNodeListLookup(int devid, bool parent, void *opaque)
{
struct vshNodeList *arrays = opaque;
if (parent)
return arrays->parents[devid];
return arrays->names[devid];
}
static int
vshNodeDeviceSorter(const void *a, const void *b)
{
virNodeDevicePtr *na = (virNodeDevicePtr *) a;
virNodeDevicePtr *nb = (virNodeDevicePtr *) b;
if (*na && !*nb)
return -1;
if (!*na)
return *nb != NULL;
return vshStrcasecmp(virNodeDeviceGetName(*na),
virNodeDeviceGetName(*nb));
}
struct vshNodeDeviceList {
virNodeDevicePtr *devices;
size_t ndevices;
};
typedef struct vshNodeDeviceList *vshNodeDeviceListPtr;
static void
vshNodeDeviceListFree(vshNodeDeviceListPtr list)
{
size_t i;
if (list && list->devices) {
for (i = 0; i < list->ndevices; i++) {
if (list->devices[i])
virNodeDeviceFree(list->devices[i]);
}
VIR_FREE(list->devices);
}
VIR_FREE(list);
}
static vshNodeDeviceListPtr
vshNodeDeviceListCollect(vshControl *ctl,
char **capnames,
int ncapnames,
unsigned int flags)
{
vshNodeDeviceListPtr list = vshMalloc(ctl, sizeof(*list));
size_t i;
int ret;
virNodeDevicePtr device;
bool success = false;
size_t deleted = 0;
int ndevices = 0;
char **names = NULL;
/* try the list with flags support (0.10.2 and later) */
if ((ret = virConnectListAllNodeDevices(ctl->conn,
&list->devices,
flags)) >= 0) {
list->ndevices = ret;
goto finished;
}
/* check if the command is actually supported */
if (last_error && last_error->code == VIR_ERR_NO_SUPPORT)
goto fallback;
/* there was an error during the call */
vshError(ctl, "%s", _("Failed to list node devices"));
goto cleanup;
fallback:
/* fall back to old method (0.10.1 and older) */
vshResetLibvirtError();
ndevices = virNodeNumOfDevices(ctl->conn, NULL, 0);
if (ndevices < 0) {
vshError(ctl, "%s", _("Failed to count node devices"));
goto cleanup;
}
if (ndevices == 0)
return list;
names = vshMalloc(ctl, sizeof(char *) * ndevices);
ndevices = virNodeListDevices(ctl->conn, NULL, names, ndevices, 0);
if (ndevices < 0) {
vshError(ctl, "%s", _("Failed to list node devices"));
goto cleanup;
}
list->devices = vshMalloc(ctl, sizeof(virNodeDevicePtr) * (ndevices));
list->ndevices = 0;
/* get the node devices */
for (i = 0; i < ndevices; i++) {
if (!(device = virNodeDeviceLookupByName(ctl->conn, names[i])))
continue;
list->devices[list->ndevices++] = device;
}
/* truncate domains that weren't found */
deleted = ndevices - list->ndevices;
if (!capnames)
goto finished;
/* filter the list if the list was acquired by fallback means */
for (i = 0; i < list->ndevices; i++) {
char **caps = NULL;
int ncaps = 0;
bool match = false;
device = list->devices[i];
if ((ncaps = virNodeDeviceNumOfCaps(device)) < 0) {
vshError(ctl, "%s", _("Failed to get capability numbers "
"of the device"));
goto cleanup;
}
caps = vshMalloc(ctl, sizeof(char *) * ncaps);
if ((ncaps = virNodeDeviceListCaps(device, caps, ncaps)) < 0) {
vshError(ctl, "%s", _("Failed to get capability names of the device"));
VIR_FREE(caps);
goto cleanup;
}
/* Check if the device's capability matches with provided
* capabilities.
*/
size_t j, k;
for (j = 0; j < ncaps; j++) {
for (k = 0; k < ncapnames; k++) {
if (STREQ(caps[j], capnames[k])) {
match = true;
break;
}
}
}
VIR_FREE(caps);
if (!match)
goto remove_entry;
/* the device matched all filters, it may stay */
continue;
remove_entry:
/* the device has to be removed as it failed one of the filters */
virNodeDeviceFree(list->devices[i]);
list->devices[i] = NULL;
deleted++;
}
finished:
/* sort the list */
if (list->devices && list->ndevices)
qsort(list->devices, list->ndevices,
sizeof(*list->devices), vshNodeDeviceSorter);
/* truncate the list if filter simulation deleted entries */
if (deleted)
VIR_SHRINK_N(list->devices, list->ndevices, deleted);
success = true;
cleanup:
for (i = 0; ndevices != -1 && i < ndevices; i++)
VIR_FREE(names[i]);
VIR_FREE(names);
if (!success) {
vshNodeDeviceListFree(list);
list = NULL;
}
return list;
}
/*
* "nodedev-list" command
*/
static const vshCmdInfo info_node_list_devices[] = {
{.name = "help",
.data = N_("enumerate devices on this host")
},
{.name = "desc",
.data = ""
},
{.name = NULL}
};
static const vshCmdOptDef opts_node_list_devices[] = {
{.name = "tree",
.type = VSH_OT_BOOL,
.help = N_("list devices in a tree")
},
{.name = "cap",
.type = VSH_OT_STRING,
.help = N_("capability names, separated by comma")
},
{.name = NULL}
};
static bool
cmdNodeListDevices(vshControl *ctl, const vshCmd *cmd ATTRIBUTE_UNUSED)
{
const char *cap_str = NULL;
size_t i;
bool tree = vshCommandOptBool(cmd, "tree");
bool ret = true;
unsigned int flags = 0;
char **caps = NULL;
int ncaps = 0;
vshNodeDeviceListPtr list = NULL;
int cap_type = -1;
ignore_value(vshCommandOptString(cmd, "cap", &cap_str));
if (cap_str) {
if (tree) {
vshError(ctl, "%s", _("Options --tree and --cap are incompatible"));
return false;
}
if ((ncaps = vshStringToArray(cap_str, &caps)) < 0)
return false;
}
for (i = 0; i < ncaps; i++) {
if ((cap_type = virNodeDevCapTypeFromString(caps[i])) < 0) {
vshError(ctl, "%s", _("Invalid capability type"));
ret = false;
goto cleanup;
}
switch (cap_type) {
case VIR_NODE_DEV_CAP_SYSTEM:
flags |= VIR_CONNECT_LIST_NODE_DEVICES_CAP_SYSTEM;
break;
case VIR_NODE_DEV_CAP_PCI_DEV:
flags |= VIR_CONNECT_LIST_NODE_DEVICES_CAP_PCI_DEV;
break;
case VIR_NODE_DEV_CAP_USB_DEV:
flags |= VIR_CONNECT_LIST_NODE_DEVICES_CAP_USB_DEV;
break;
case VIR_NODE_DEV_CAP_USB_INTERFACE:
flags |= VIR_CONNECT_LIST_NODE_DEVICES_CAP_USB_INTERFACE;
break;
case VIR_NODE_DEV_CAP_NET:
flags |= VIR_CONNECT_LIST_NODE_DEVICES_CAP_NET;
break;
case VIR_NODE_DEV_CAP_SCSI_HOST:
flags |= VIR_CONNECT_LIST_NODE_DEVICES_CAP_SCSI_HOST;
break;
case VIR_NODE_DEV_CAP_SCSI_TARGET:
flags |= VIR_CONNECT_LIST_NODE_DEVICES_CAP_SCSI_TARGET;
break;
case VIR_NODE_DEV_CAP_SCSI:
flags |= VIR_CONNECT_LIST_NODE_DEVICES_CAP_SCSI;
break;
case VIR_NODE_DEV_CAP_STORAGE:
flags |= VIR_CONNECT_LIST_NODE_DEVICES_CAP_STORAGE;
break;
case VIR_NODE_DEV_CAP_FC_HOST:
flags |= VIR_CONNECT_LIST_NODE_DEVICES_CAP_FC_HOST;
break;
case VIR_NODE_DEV_CAP_VPORTS:
flags |= VIR_CONNECT_LIST_NODE_DEVICES_CAP_VPORTS;
break;
case VIR_NODE_DEV_CAP_SCSI_GENERIC:
flags |= VIR_CONNECT_LIST_NODE_DEVICES_CAP_SCSI_GENERIC;
break;
default:
break;
}
}
if (!(list = vshNodeDeviceListCollect(ctl, caps, ncaps, flags))) {
ret = false;
goto cleanup;
}
if (tree) {
char **parents = vshMalloc(ctl, sizeof(char *) * list->ndevices);
char **names = vshMalloc(ctl, sizeof(char *) * list->ndevices);
struct vshNodeList arrays = { names, parents };
for (i = 0; i < list->ndevices; i++)
names[i] = vshStrdup(ctl, virNodeDeviceGetName(list->devices[i]));
for (i = 0; i < list->ndevices; i++) {
virNodeDevicePtr dev = list->devices[i];
if (STRNEQ(names[i], "computer")) {
const char *parent = virNodeDeviceGetParent(dev);
parents[i] = parent ? vshStrdup(ctl, parent) : NULL;
} else {
parents[i] = NULL;
}
}
for (i = 0; i < list->ndevices; i++) {
if (parents[i] == NULL &&
vshTreePrint(ctl, vshNodeListLookup, &arrays,
list->ndevices, i) < 0)
ret = false;
}
for (i = 0; i < list->ndevices; i++)
VIR_FREE(parents[i]);
VIR_FREE(parents);
for (i = 0; i < list->ndevices; i++)
VIR_FREE(names[i]);
VIR_FREE(names);
} else {
for (i = 0; i < list->ndevices; i++)
vshPrint(ctl, "%s\n", virNodeDeviceGetName(list->devices[i]));
}
cleanup:
virStringFreeList(caps);
vshNodeDeviceListFree(list);
return ret;
}
/*
* "nodedev-dumpxml" command
*/
static const vshCmdInfo info_node_device_dumpxml[] = {
{.name = "help",
.data = N_("node device details in XML")
},
{.name = "desc",
.data = N_("Output the node device details as an XML dump to stdout.")
},
{.name = NULL}
};
static const vshCmdOptDef opts_node_device_dumpxml[] = {
{.name = "device",
.type = VSH_OT_DATA,
.flags = VSH_OFLAG_REQ,
.help = N_("device name or wwn pair in 'wwnn,wwpn' format"),
},
{.name = NULL}
};
static bool
cmdNodeDeviceDumpXML(vshControl *ctl, const vshCmd *cmd)
{
virNodeDevicePtr device = NULL;
char *xml = NULL;
const char *device_value = NULL;
char **arr = NULL;
int narr;
bool ret = false;
if (vshCommandOptStringReq(ctl, cmd, "device", &device_value) < 0)
return false;
if (strchr(device_value, ',')) {
narr = vshStringToArray(device_value, &arr);
if (narr != 2) {
vshError(ctl, _("Malformed device value '%s'"), device_value);
goto cleanup;
}
if (!virValidateWWN(arr[0]) || !virValidateWWN(arr[1]))
goto cleanup;
device = virNodeDeviceLookupSCSIHostByWWN(ctl->conn, arr[0], arr[1], 0);
} else {
device = virNodeDeviceLookupByName(ctl->conn, device_value);
}
if (!device) {
vshError(ctl, "%s '%s'", _("Could not find matching device"), device_value);
goto cleanup;
}
if (!(xml = virNodeDeviceGetXMLDesc(device, 0)))
goto cleanup;
vshPrint(ctl, "%s\n", xml);
ret = true;
cleanup:
virStringFreeList(arr);
VIR_FREE(xml);
if (device)
virNodeDeviceFree(device);
return ret;
}
/*
* "nodedev-detach" command
*/
static const vshCmdInfo info_node_device_detach[] = {
{.name = "help",
.data = N_("detach node device from its device driver")
},
{.name = "desc",
.data = N_("Detach node device from its device driver before assigning to a domain.")
},
{.name = NULL}
};
static const vshCmdOptDef opts_node_device_detach[] = {
{.name = "device",
.type = VSH_OT_DATA,
.flags = VSH_OFLAG_REQ,
.help = N_("device key")
},
{.name = "driver",
.type = VSH_OT_STRING,
.help = N_("pci device assignment backend driver (e.g. 'vfio' or 'kvm')")
},
{.name = NULL}
};
static bool
cmdNodeDeviceDetach(vshControl *ctl, const vshCmd *cmd)
{
const char *name = NULL;
const char *driverName = NULL;
virNodeDevicePtr device;
bool ret = true;
if (vshCommandOptStringReq(ctl, cmd, "device", &name) < 0)
return false;
ignore_value(vshCommandOptString(cmd, "driver", &driverName));
if (!(device = virNodeDeviceLookupByName(ctl->conn, name))) {
vshError(ctl, _("Could not find matching device '%s'"), name);
return false;
}
if (driverName) {
/* we must use the newer API that accepts a driverName */
if (virNodeDeviceDetachFlags(device, driverName, 0) < 0)
ret = false;
} else {
/* Yes, our (old) public API is misspelled. At least virsh
* can accept either spelling. */
if (virNodeDeviceDettach(device) < 0)
ret = false;
}
if (ret)
vshPrint(ctl, _("Device %s detached\n"), name);
else
vshError(ctl, _("Failed to detach device %s"), name);
virNodeDeviceFree(device);
return ret;
}
/*
* "nodedev-reattach" command
*/
static const vshCmdInfo info_node_device_reattach[] = {
{.name = "help",
.data = N_("reattach node device to its device driver")
},
{.name = "desc",
.data = N_("Reattach node device to its device driver once released by the domain.")
},
{.name = NULL}
};
static const vshCmdOptDef opts_node_device_reattach[] = {
{.name = "device",
.type = VSH_OT_DATA,
.flags = VSH_OFLAG_REQ,
.help = N_("device key")
},
{.name = NULL}
};
static bool
cmdNodeDeviceReAttach(vshControl *ctl, const vshCmd *cmd)
{
const char *name = NULL;
virNodeDevicePtr device;
bool ret = true;
if (vshCommandOptStringReq(ctl, cmd, "device", &name) < 0)
return false;
if (!(device = virNodeDeviceLookupByName(ctl->conn, name))) {
vshError(ctl, _("Could not find matching device '%s'"), name);
return false;
}
if (virNodeDeviceReAttach(device) == 0) {
vshPrint(ctl, _("Device %s re-attached\n"), name);
} else {
vshError(ctl, _("Failed to re-attach device %s"), name);
ret = false;
}
virNodeDeviceFree(device);
return ret;
}
/*
* "nodedev-reset" command
*/
static const vshCmdInfo info_node_device_reset[] = {
{.name = "help",
.data = N_("reset node device")
},
{.name = "desc",
.data = N_("Reset node device before or after assigning to a domain.")
},
{.name = NULL}
};
static const vshCmdOptDef opts_node_device_reset[] = {
{.name = "device",
.type = VSH_OT_DATA,
.flags = VSH_OFLAG_REQ,
.help = N_("device key")
},
{.name = NULL}
};
static bool
cmdNodeDeviceReset(vshControl *ctl, const vshCmd *cmd)
{
const char *name = NULL;
virNodeDevicePtr device;
bool ret = true;
if (vshCommandOptStringReq(ctl, cmd, "device", &name) < 0)
return false;
if (!(device = virNodeDeviceLookupByName(ctl->conn, name))) {
vshError(ctl, _("Could not find matching device '%s'"), name);
return false;
}
if (virNodeDeviceReset(device) == 0) {
vshPrint(ctl, _("Device %s reset\n"), name);
} else {
vshError(ctl, _("Failed to reset device %s"), name);
ret = false;
}
virNodeDeviceFree(device);
return ret;
}
const vshCmdDef nodedevCmds[] = {
{.name = "nodedev-create",
.handler = cmdNodeDeviceCreate,
.opts = opts_node_device_create,
.info = info_node_device_create,
.flags = 0
},
{.name = "nodedev-destroy",
.handler = cmdNodeDeviceDestroy,
.opts = opts_node_device_destroy,
.info = info_node_device_destroy,
.flags = 0
},
{.name = "nodedev-detach",
.handler = cmdNodeDeviceDetach,
.opts = opts_node_device_detach,
.info = info_node_device_detach,
.flags = 0
},
{.name = "nodedev-dettach",
.handler = cmdNodeDeviceDetach,
.opts = opts_node_device_detach,
.info = info_node_device_detach,
.flags = VSH_CMD_FLAG_ALIAS
},
{.name = "nodedev-dumpxml",
.handler = cmdNodeDeviceDumpXML,
.opts = opts_node_device_dumpxml,
.info = info_node_device_dumpxml,
.flags = 0
},
{.name = "nodedev-list",
.handler = cmdNodeListDevices,
.opts = opts_node_list_devices,
.info = info_node_list_devices,
.flags = 0
},
{.name = "nodedev-reattach",
.handler = cmdNodeDeviceReAttach,
.opts = opts_node_device_reattach,
.info = info_node_device_reattach,
.flags = 0
},
{.name = "nodedev-reset",
.handler = cmdNodeDeviceReset,
.opts = opts_node_device_reset,
.info = info_node_device_reset,
.flags = 0
},
{.name = NULL}
};
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